the family of oscar grant speaks out. >>> and a bizarre stand off in the south bay involving a naked man. the unusual weapon that had officers on alert. >>> the police shooting of b.a.r.t. passengeroscar grant is being remembered tonight by many people around the bay area. rob roth attended a vigil at oakland's fruitvale station in this fourth anniversary of the shooting of the unarmed man. >> reporter: dozens of people gathered to remember oscar grant. >> if they did not video tape what was happening on that platform. like i said none of us would know who oscar grant is. >> reporter: for grant's mother even four years later the pain of losing her son is still unbearable. >> it doesn't matter if it was a year ago or five years ago, it's still your child and it still hurts. >> reporter: police were responding to reports of a fight when officers detained b.a.r.t. mehserle shot him in the back. >> and he didn't even have to go to prison not one day. he went to jail. you know or protective custody. >> reporter: the larger message today was a call to stop what they see as racial profiling